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How to boot to macOS Catalina from USB Installer made on WindowsД¬heck the image below for macOS Catalina USB installer showing up in the boot options. But this method is also applicable for Mojave, High Sierra 10.13.6 and all previous macOS versions up-to OS X Lion.Д¬heck our video on creating macOS USB installer on Windows 10 for the proof. Here we focus on preparing macOS Catalina 10.15.4 USB installer on Windows.

Now, safely remove the USB and connect it to the Mac you would like to recover.

If you click on the just-made USB installer on Transmac, you can see the macOS Catalina 10.15 files present in the drive.

The disk is ready when you see the message вЂњRestore CompleteвЂќ.

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Wait until the software completes restoring the USB disk with Install macOS Catalina app.

Point the Windows Explorer to the location where you have the bootable macOS DMG file.

As shown in the screenshot, right-click on your USB disk and pick the option Restore with Disk Image.

Right-click on Transmac icon, and select to run it with Admin privileges.

Install the Transmac 12.6 trial for Windows download here.

I already have the macOS Catalina 10.15 dmg file on my Windows desktop.

Now letвЂ™s move on to the steps to create macOS Catalina USB disk on Windows. Transmac is not free, but the developers offer a 15-day trial period, and that is sufficient for one-time use. Out of the two or three software for handling macOS installer in Windows, Transmac is the best one. When the Internet recovery is stuck and fails to download the OS files, you could use Windows to make a bootable macOS USB installer. Step 3: Make bootable macOS Catalina USB installer on Windows 10 It cleans and converts the USB disk to GUID partition table if it is using MBR or something else. Search and open the command line tool, and run the above given commands in the correct order. Converting the USB disk to have a GUID partition table (GTP) is recommended for this method work effectively.Д¬onnect a USB disk of more than 8GB free space to the Windows PC. So make sure that we keep the partition of the USB disk to have an appropriate scheme.

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Here we are creating a UBS installer for Mac on Windows. Step 2: Partition USB disk on Windows to make it bootable on Mac Also, you can legally make a macOS DMG by following our tutorial on converting macOS installer. Check our page to get macOS offline installer in DMG format for Catalina, Mojave or High Sierra. Most of the sites talking about the bootable macOS USB installer on Windows is not guiding on how to arrange the required DMG files for the method. Hence, If we can download macOS DMG file, then it possible build the USB installer from Windows environment. Luckily some Windows applications support a bootable macOS disk format, DMG. The cross-compatibility of extensions for the two OS are entirely different. If you think about doing it from Windows, the options are limited. Step 1: Download macOS Catalina for WindowsДЄs said in the beginning, a Mac is must for creating bootable macOS USB disk. As of now, the OS is Catalina 10.15.4, but the process given below is compatible with all editions of macOS including High Sierra. I did this for making a macOS High Sierra USB drive, and later I was successful in reinstating my iMac.

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As it is my only Mac, I had no option left, until I found the method to use a Windows PC to create a Mac OS bootable USB installer. Internet recovery was showing up, but it kept on failing to download the OS files from the servers.

In my case, I lost the boot partition of my iMac and didnвЂ™t have a TimeMachine backup. If a backup is not there, you have to go for a clean installation either from a bootable USB/DVD drive or the Internet. TimeMachine is the safest option to recover a broken Mac in the offline mode.

Make macOS Catalina USB installer on Windows PC In this post, we explore the ways to make a bootable macOS USB for Catalina 10.15, High Sierra 10.13.6, and others from Windows PC and Mac. However, people use this feature only when they have a problem with their computer, mainly when their system is not booting up.

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It is easy to make a macOS USB disk from the full installer downloaded from the App store Apple provides clear-cut instructions for the same. Also, it helps in recovering a system after a startup failure.

Alternative: Make a bootable Catalina USB installer on macOSДЄ macOS USB installer saves much time when you want to install the OS offline on two or more Macs.

Make macOS Catalina USB installer on Windows PC.

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